Critical Nitrogen Concentration in High-Nitrogen Steels for the Production of a Dense Ingot

The critical concentration of nitrogen in steel during its equilibrium crystallization is best defined as the concentration at which the nitrogen content of the remaining liquid steel does not exceed nitrogen's solubility in the liquid at the given pressure and temperature. The critical nitrogen concentration is most expediently determined by means of the program Thermo-Calc. Calculated values of critical concentration obtained from the program should then be refined in practice for specific crystallization conditions.